html {
    width: 100%;
    height: 100%;
}
body {
    margin: 0px;
    padding: 0px;
    width: 100%;
    height: 100%;
}

.main{
    background-color: #fff;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    margin:0;
    padding: 8px;
    position: relative;
    height: 100%;
    width: 100%;
    overflow-y: auto;

}